Arrays

An array is used to hold the more than one number of homogeneous data.

The length of an array is established when the array is created.

After creation, its length is fixed.

Array initialization

The syntax of array initialization is

datatype[] name={item1,item2,...,item n};

OR

name[index position]= item or value;

Accessing array elements

Array elements can be either accessed using their index value or using the looping statements

Example

System.out.println(a[1]);

or

for(int i =0 ;some condition; i++)

{ System.out.println(a[i]);}

Array resizing

Syntax

aname=Arrays.copyOf(aname, new size);

example

int[] a= new int[4];

a= Arrays.copyOf(a, 8);

Types of array

● One dimensional array● Two dimensional array● Multi dimensional array

Two dimensional array

The two dimensional arrays are like a table

The Syntax for declaring a 2-D array is

Dtype [][] name= new Dtype[size][size];